By her insane prattling on everything from the HPV vaccine causing mental retardation to a re-play of the Cuban Missile Crisis starring Hezbollah, Michele Bachmann hurts not just herself, but the entire wing of the GOP she aspires to represent.
You can be a social conservative without being crazy. You can be an economic conservative without being crazy. You can be a national-security conservative without being crazy.
But the more rabid nonsense the country hears from Bachmann, the more she taints the non-establishment side of the party. The sooner they get her to drop out, the less credibility they lose.